halbergman/E+ via Getty Images In May, I covered Sky Harbour Group (NYSE:SKYH) and I reiterated my buy rating. However, since then, the stock has been more or less flat on a market that gained 6%. That is not the kind of stock price movement we would want to see for a name with a buy rating. However, we should also consider that the stock has performed incredibly well since my buy rating from a year ago, gaining 130% since my Buy rating from last year, easily outperforming the markets. Why Is Sky Harbour Gr ...